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[hh.org.git] / drivers / video / console / fbcon.c
blob302174b8e477df2eec923f51abe69bc7ab7a4e2e
1 /*
2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
3 *
4 * Copyright (C) 1995 Geert Uytterhoeven
5 *
6 *
7 * This file is based on the original Amiga console driver (amicon.c):
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 * Greg Harp
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
12 *
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
14 * Geert Uytterhoeven
15 * Jes Sorensen (jds@kom.auc.dk)
16 * Martin Apel
17 *
18 * and on the original Atari console driver (atacon.c):
19 *
20 * Copyright (C) 1993 Bjoern Brauel
21 * Roman Hodek
22 *
23 * with work by Guenther Kelleter
24 * Martin Schaller
25 * Andreas Schwab
26 *
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
31 *
32 * Random hacking by Martin Mares <mj@ucw.cz>
33 *
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
36 *
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
39 *
40 * Currently the following organizations are supported:
41 *
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
46 * o mfb Monochrome
47 * o vga VGA characters/attributes
48 *
49 * To do:
50 *
51 * - Implement 16 plane mode (iplan2p16)
52 *
53 *
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
56 * more details.
57 */
58
59 #undef FBCONDEBUG
60
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/sched.h>
64 #include <linux/fs.h>
65 #include <linux/kernel.h>
66 #include <linux/delay.h> /* MSch: for IRQ probe */
67 #include <linux/console.h>
68 #include <linux/string.h>
69 #include <linux/kd.h>
70 #include <linux/slab.h>
71 #include <linux/fb.h>
72 #include <linux/vt_kern.h>
73 #include <linux/selection.h>
74 #include <linux/font.h>
75 #include <linux/smp.h>
76 #include <linux/init.h>
77 #include <linux/interrupt.h>
78 #include <linux/crc32.h> /* For counting font checksums */
79 #include <asm/irq.h>
80 #include <asm/system.h>
81 #include <asm/uaccess.h>
82 #ifdef CONFIG_ATARI
83 #include <asm/atariints.h>
84 #endif
85 #ifdef CONFIG_MAC
86 #include <asm/macints.h>
87 #endif
88 #if defined(__mc68000__) || defined(CONFIG_APUS)
89 #include <asm/machdep.h>
90 #include <asm/setup.h>
91 #endif
92
93 #include "fbcon.h"
94
95 #ifdef FBCONDEBUG
96 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
97 #else
98 # define DPRINTK(fmt, args...)
99 #endif
100
101 enum {
102 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
103 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
104 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
105 };
106
107 static struct display fb_display[MAX_NR_CONSOLES];
108
109 static signed char con2fb_map[MAX_NR_CONSOLES];
110 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
111 static int logo_height;
112 static int logo_lines;
113 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
114 enums. */
115 static int logo_shown = FBCON_LOGO_CANSHOW;
116 /* Software scrollback */
117 static int fbcon_softback_size = 32768;
118 static unsigned long softback_buf, softback_curr;
119 static unsigned long softback_in;
120 static unsigned long softback_top, softback_end;
121 static int softback_lines;
122 /* console mappings */
123 static int first_fb_vc;
124 static int last_fb_vc = MAX_NR_CONSOLES - 1;
125 static int fbcon_is_default = 1;
126 static int fbcon_has_exited;
127
128 /* font data */
129 static char fontname[40];
130
131 /* current fb_info */
132 static int info_idx = -1;
133
134 /* console rotation */
135 static int rotate;
136 static int fbcon_has_sysfs;
137
138 static const struct consw fb_con;
139
140 #define CM_SOFTBACK (8)
141
142 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
143
144 static int fbcon_set_origin(struct vc_data *);
145
146 #define CURSOR_DRAW_DELAY (1)
147
148 /* # VBL ints between cursor state changes */
149 #define ATARI_CURSOR_BLINK_RATE (42)
150 #define MAC_CURSOR_BLINK_RATE (32)
151 #define DEFAULT_CURSOR_BLINK_RATE (20)
152
153 static int vbl_cursor_cnt;
154
155 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
156
157 /*
158 * Interface used by the world
159 */
160
161 static const char *fbcon_startup(void);
162 static void fbcon_init(struct vc_data *vc, int init);
163 static void fbcon_deinit(struct vc_data *vc);
164 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
165 int width);
166 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
167 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
168 int count, int ypos, int xpos);
169 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
170 static void fbcon_cursor(struct vc_data *vc, int mode);
171 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
172 int count);
173 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
174 int height, int width);
175 static int fbcon_switch(struct vc_data *vc);
176 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
177 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
178 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
179
180 /*
181 * Internal routines
182 */
183 static __inline__ void ywrap_up(struct vc_data *vc, int count);
184 static __inline__ void ywrap_down(struct vc_data *vc, int count);
185 static __inline__ void ypan_up(struct vc_data *vc, int count);
186 static __inline__ void ypan_down(struct vc_data *vc, int count);
187 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
188 int dy, int dx, int height, int width, u_int y_break);
189 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
190 struct vc_data *vc);
191 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
192 int unit);
193 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
194 int line, int count, int dy);
195 static void fbcon_modechanged(struct fb_info *info);
196 static void fbcon_set_all_vcs(struct fb_info *info);
197 static void fbcon_start(void);
198 static void fbcon_exit(void);
199 static struct class_device *fbcon_class_device;
200
201 #ifdef CONFIG_MAC
202 /*
203 * On the Macintoy, there may or may not be a working VBL int. We need to probe
204 */
205 static int vbl_detected;
206
207 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
208 {
209 vbl_detected++;
210 return IRQ_HANDLED;
211 }
212 #endif
213
214 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
215 static inline void fbcon_set_rotation(struct fb_info *info)
216 {
217 struct fbcon_ops *ops = info->fbcon_par;
218
219 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
220 ops->p->con_rotate < 4)
221 ops->rotate = ops->p->con_rotate;
222 else
223 ops->rotate = 0;
224 }
225
226 static void fbcon_rotate(struct fb_info *info, u32 rotate)
227 {
228 struct fbcon_ops *ops= info->fbcon_par;
229 struct fb_info *fb_info;
230
231 if (!ops || ops->currcon == -1)
232 return;
233
234 fb_info = registered_fb[con2fb_map[ops->currcon]];
235
236 if (info == fb_info) {
237 struct display *p = &fb_display[ops->currcon];
238
239 if (rotate < 4)
240 p->con_rotate = rotate;
241 else
242 p->con_rotate = 0;
243
244 fbcon_modechanged(info);
245 }
246 }
247
248 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
249 {
250 struct fbcon_ops *ops = info->fbcon_par;
251 struct vc_data *vc;
252 struct display *p;
253 int i;
254
255 if (!ops || ops->currcon < 0 || rotate > 3)
256 return;
257
258 for (i = first_fb_vc; i <= last_fb_vc; i++) {
259 vc = vc_cons[i].d;
260 if (!vc || vc->vc_mode != KD_TEXT ||
261 registered_fb[con2fb_map[i]] != info)
262 continue;
263
264 p = &fb_display[vc->vc_num];
265 p->con_rotate = rotate;
266 }
267
268 fbcon_set_all_vcs(info);
269 }
270 #else
271 static inline void fbcon_set_rotation(struct fb_info *info)
272 {
273 struct fbcon_ops *ops = info->fbcon_par;
274
275 ops->rotate = FB_ROTATE_UR;
276 }
277
278 static void fbcon_rotate(struct fb_info *info, u32 rotate)
279 {
280 return;
281 }
282
283 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
284 {
285 return;
286 }
287 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
288
289 static int fbcon_get_rotate(struct fb_info *info)
290 {
291 struct fbcon_ops *ops = info->fbcon_par;
292
293 return (ops) ? ops->rotate : 0;
294 }
295
296 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
297 {
298 struct fbcon_ops *ops = info->fbcon_par;
299
300 return (info->state != FBINFO_STATE_RUNNING ||
301 vc->vc_mode != KD_TEXT || ops->graphics);
302 }
303
304 static inline int get_color(struct vc_data *vc, struct fb_info *info,
305 u16 c, int is_fg)
306 {
307 int depth = fb_get_color_depth(&info->var, &info->fix);
308 int color = 0;
309
310 if (console_blanked) {
311 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
312
313 c = vc->vc_video_erase_char & charmask;
314 }
315
316 if (depth != 1)
317 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
318 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
319
320 switch (depth) {
321 case 1:
322 {
323 int col = ~(0xfff << (max(info->var.green.length,
324 max(info->var.red.length,
325 info->var.blue.length)))) & 0xff;
326
327 /* 0 or 1 */
328 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
329 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
330
331 if (console_blanked)
332 fg = bg;
333
334 color = (is_fg) ? fg : bg;
335 break;
336 }
337 case 2:
338 /*
339 * Scale down 16-colors to 4 colors. Default 4-color palette
340 * is grayscale. However, simply dividing the values by 4
341 * will not work, as colors 1, 2 and 3 will be scaled-down
342 * to zero rendering them invisible. So empirically convert
343 * colors to a sane 4-level grayscale.
344 */
345 switch (color) {
346 case 0:
347 color = 0; /* black */
348 break;
349 case 1 ... 6:
350 color = 2; /* white */
351 break;
352 case 7 ... 8:
353 color = 1; /* gray */
354 break;
355 default:
356 color = 3; /* intense white */
357 break;
358 }
359 break;
360 case 3:
361 /*
362 * Last 8 entries of default 16-color palette is a more intense
363 * version of the first 8 (i.e., same chrominance, different
364 * luminance).
365 */
366 color &= 7;
367 break;
368 }
369
370
371 return color;
372 }
373
374 static void fbcon_update_softback(struct vc_data *vc)
375 {
376 int l = fbcon_softback_size / vc->vc_size_row;
377
378 if (l > 5)
379 softback_end = softback_buf + l * vc->vc_size_row;
380 else
381 /* Smaller scrollback makes no sense, and 0 would screw
382 the operation totally */
383 softback_top = 0;
384 }
385
386 static void fb_flashcursor(void *private)
387 {
388 struct fb_info *info = private;
389 struct fbcon_ops *ops = info->fbcon_par;
390 struct display *p;
391 struct vc_data *vc = NULL;
392 int c;
393 int mode;
394
395 acquire_console_sem();
396 if (ops && ops->currcon != -1)
397 vc = vc_cons[ops->currcon].d;
398
399 if (!vc || !CON_IS_VISIBLE(vc) ||
400 registered_fb[con2fb_map[vc->vc_num]] != info ||
401 vc->vc_deccm != 1) {
402 release_console_sem();
403 return;
404 }
405
406 p = &fb_display[vc->vc_num];
407 c = scr_readw((u16 *) vc->vc_pos);
408 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
409 CM_ERASE : CM_DRAW;
410 ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
411 get_color(vc, info, c, 0));
412 release_console_sem();
413 }
414
415 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
416 static int cursor_blink_rate;
417 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
418 {
419 struct fb_info *info = dev_id;
420
421 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
422 schedule_work(&info->queue);
423 vbl_cursor_cnt = cursor_blink_rate;
424 }
425 return IRQ_HANDLED;
426 }
427 #endif
428
429 static void cursor_timer_handler(unsigned long dev_addr)
430 {
431 struct fb_info *info = (struct fb_info *) dev_addr;
432 struct fbcon_ops *ops = info->fbcon_par;
433
434 schedule_work(&info->queue);
435 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
436 }
437
438 static void fbcon_add_cursor_timer(struct fb_info *info)
439 {
440 struct fbcon_ops *ops = info->fbcon_par;
441
442 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
443 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
444 if (!info->queue.func)
445 INIT_WORK(&info->queue, fb_flashcursor, info);
446
447 init_timer(&ops->cursor_timer);
448 ops->cursor_timer.function = cursor_timer_handler;
449 ops->cursor_timer.expires = jiffies + HZ / 5;
450 ops->cursor_timer.data = (unsigned long ) info;
451 add_timer(&ops->cursor_timer);
452 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
453 }
454 }
455
456 static void fbcon_del_cursor_timer(struct fb_info *info)
457 {
458 struct fbcon_ops *ops = info->fbcon_par;
459
460 if (info->queue.func == fb_flashcursor &&
461 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
462 del_timer_sync(&ops->cursor_timer);
463 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
464 }
465 }
466
467 #ifndef MODULE
468 static int __init fb_console_setup(char *this_opt)
469 {
470 char *options;
471 int i, j;
472
473 if (!this_opt || !*this_opt)
474 return 1;
475
476 while ((options = strsep(&this_opt, ",")) != NULL) {
477 if (!strncmp(options, "font:", 5))
478 strcpy(fontname, options + 5);
479
480 if (!strncmp(options, "scrollback:", 11)) {
481 options += 11;
482 if (*options) {
483 fbcon_softback_size = simple_strtoul(options, &options, 0);
484 if (*options == 'k' || *options == 'K') {
485 fbcon_softback_size *= 1024;
486 options++;
487 }
488 if (*options != ',')
489 return 1;
490 options++;
491 } else
492 return 1;
493 }
494
495 if (!strncmp(options, "map:", 4)) {
496 options += 4;
497 if (*options)
498 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
499 if (!options[j])
500 j = 0;
501 con2fb_map_boot[i] =
502 (options[j++]-'0') % FB_MAX;
503 }
504 return 1;
505 }
506
507 if (!strncmp(options, "vc:", 3)) {
508 options += 3;
509 if (*options)
510 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
511 if (first_fb_vc < 0)
512 first_fb_vc = 0;
513 if (*options++ == '-')
514 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
515 fbcon_is_default = 0;
516 }
517
518 if (!strncmp(options, "rotate:", 7)) {
519 options += 7;
520 if (*options)
521 rotate = simple_strtoul(options, &options, 0);
522 if (rotate > 3)
523 rotate = 0;
524 }
525 }
526 return 1;
527 }
528
529 __setup("fbcon=", fb_console_setup);
530 #endif
531
532 static int search_fb_in_map(int idx)
533 {
534 int i, retval = 0;
535
536 for (i = first_fb_vc; i <= last_fb_vc; i++) {
537 if (con2fb_map[i] == idx)
538 retval = 1;
539 }
540 return retval;
541 }
542
543 static int search_for_mapped_con(void)
544 {
545 int i, retval = 0;
546
547 for (i = first_fb_vc; i <= last_fb_vc; i++) {
548 if (con2fb_map[i] != -1)
549 retval = 1;
550 }
551 return retval;
552 }
553
554 static int fbcon_takeover(int show_logo)
555 {
556 int err, i;
557
558 if (!num_registered_fb)
559 return -ENODEV;
560
561 if (!show_logo)
562 logo_shown = FBCON_LOGO_DONTSHOW;
563
564 for (i = first_fb_vc; i <= last_fb_vc; i++)
565 con2fb_map[i] = info_idx;
566
567 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
568 fbcon_is_default);
569
570 if (err) {
571 for (i = first_fb_vc; i <= last_fb_vc; i++) {
572 con2fb_map[i] = -1;
573 }
574 info_idx = -1;
575 }
576
577 return err;
578 }
579
580 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
581 int cols, int rows, int new_cols, int new_rows)
582 {
583 /* Need to make room for the logo */
584 struct fbcon_ops *ops = info->fbcon_par;
585 int cnt, erase = vc->vc_video_erase_char, step;
586 unsigned short *save = NULL, *r, *q;
587
588 /*
589 * remove underline attribute from erase character
590 * if black and white framebuffer.
591 */
592 if (fb_get_color_depth(&info->var, &info->fix) == 1)
593 erase &= ~0x400;
594 logo_height = fb_prepare_logo(info, ops->rotate);
595 logo_lines = (logo_height + vc->vc_font.height - 1) /
596 vc->vc_font.height;
597 q = (unsigned short *) (vc->vc_origin +
598 vc->vc_size_row * rows);
599 step = logo_lines * cols;
600 for (r = q - logo_lines * cols; r < q; r++)
601 if (scr_readw(r) != vc->vc_video_erase_char)
602 break;
603 if (r != q && new_rows >= rows + logo_lines) {
604 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
605 if (save) {
606 int i = cols < new_cols ? cols : new_cols;
607 scr_memsetw(save, erase, logo_lines * new_cols * 2);
608 r = q - step;
609 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
610 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
611 r = q;
612 }
613 }
614 if (r == q) {
615 /* We can scroll screen down */
616 r = q - step - cols;
617 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
618 scr_memcpyw(r + step, r, vc->vc_size_row);
619 r -= cols;
620 }
621 if (!save) {
622 vc->vc_y += logo_lines;
623 vc->vc_pos += logo_lines * vc->vc_size_row;
624 }
625 }
626 scr_memsetw((unsigned short *) vc->vc_origin,
627 erase,
628 vc->vc_size_row * logo_lines);
629
630 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
631 fbcon_clear_margins(vc, 0);
632 update_screen(vc);
633 }
634
635 if (save) {
636 q = (unsigned short *) (vc->vc_origin +
637 vc->vc_size_row *
638 rows);
639 scr_memcpyw(q, save, logo_lines * new_cols * 2);
640 vc->vc_y += logo_lines;
641 vc->vc_pos += logo_lines * vc->vc_size_row;
642 kfree(save);
643 }
644
645 if (logo_lines > vc->vc_bottom) {
646 logo_shown = FBCON_LOGO_CANSHOW;
647 printk(KERN_INFO
648 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
649 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
650 logo_shown = FBCON_LOGO_DRAW;
651 vc->vc_top = logo_lines;
652 }
653 }
654
655 #ifdef CONFIG_FB_TILEBLITTING
656 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
657 {
658 struct fbcon_ops *ops = info->fbcon_par;
659
660 ops->p = &fb_display[vc->vc_num];
661
662 if ((info->flags & FBINFO_MISC_TILEBLITTING))
663 fbcon_set_tileops(vc, info);
664 else {
665 fbcon_set_rotation(info);
666 fbcon_set_bitops(ops);
667 }
668 }
669 #else
670 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
671 {
672 struct fbcon_ops *ops = info->fbcon_par;
673
674 info->flags &= ~FBINFO_MISC_TILEBLITTING;
675 ops->p = &fb_display[vc->vc_num];
676 fbcon_set_rotation(info);
677 fbcon_set_bitops(ops);
678 }
679 #endif /* CONFIG_MISC_TILEBLITTING */
680
681
682 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
683 int unit, int oldidx)
684 {
685 struct fbcon_ops *ops = NULL;
686 int err = 0;
687
688 if (!try_module_get(info->fbops->owner))
689 err = -ENODEV;
690
691 if (!err && info->fbops->fb_open &&
692 info->fbops->fb_open(info, 0))
693 err = -ENODEV;
694
695 if (!err) {
696 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
697 if (!ops)
698 err = -ENOMEM;
699 }
700
701 if (!err) {
702 info->fbcon_par = ops;
703 set_blitting_type(vc, info);
704 }
705
706 if (err) {
707 con2fb_map[unit] = oldidx;
708 module_put(info->fbops->owner);
709 }
710
711 return err;
712 }
713
714 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
715 struct fb_info *newinfo, int unit,
716 int oldidx, int found)
717 {
718 struct fbcon_ops *ops = oldinfo->fbcon_par;
719 int err = 0;
720
721 if (oldinfo->fbops->fb_release &&
722 oldinfo->fbops->fb_release(oldinfo, 0)) {
723 con2fb_map[unit] = oldidx;
724 if (!found && newinfo->fbops->fb_release)
725 newinfo->fbops->fb_release(newinfo, 0);
726 if (!found)
727 module_put(newinfo->fbops->owner);
728 err = -ENODEV;
729 }
730
731 if (!err) {
732 fbcon_del_cursor_timer(oldinfo);
733 kfree(ops->cursor_state.mask);
734 kfree(ops->cursor_data);
735 kfree(ops->fontbuffer);
736 kfree(oldinfo->fbcon_par);
737 oldinfo->fbcon_par = NULL;
738 module_put(oldinfo->fbops->owner);
739 /*
740 If oldinfo and newinfo are driving the same hardware,
741 the fb_release() method of oldinfo may attempt to
742 restore the hardware state. This will leave the
743 newinfo in an undefined state. Thus, a call to
744 fb_set_par() may be needed for the newinfo.
745 */
746 if (newinfo->fbops->fb_set_par)
747 newinfo->fbops->fb_set_par(newinfo);
748 }
749
750 return err;
751 }
752
753 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
754 int unit, int show_logo)
755 {
756 struct fbcon_ops *ops = info->fbcon_par;
757
758 ops->currcon = fg_console;
759
760 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
761 info->fbops->fb_set_par(info);
762
763 ops->flags |= FBCON_FLAGS_INIT;
764 ops->graphics = 0;
765
766 if (vc)
767 fbcon_set_disp(info, &info->var, vc);
768 else
769 fbcon_preset_disp(info, &info->var, unit);
770
771 if (show_logo) {
772 struct vc_data *fg_vc = vc_cons[fg_console].d;
773 struct fb_info *fg_info =
774 registered_fb[con2fb_map[fg_console]];
775
776 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
777 fg_vc->vc_rows, fg_vc->vc_cols,
778 fg_vc->vc_rows);
779 }
780
781 update_screen(vc_cons[fg_console].d);
782 }
783
784 /**
785 * set_con2fb_map - map console to frame buffer device
786 * @unit: virtual console number to map
787 * @newidx: frame buffer index to map virtual console to
788 * @user: user request
789 *
790 * Maps a virtual console @unit to a frame buffer device
791 * @newidx.
792 */
793 static int set_con2fb_map(int unit, int newidx, int user)
794 {
795 struct vc_data *vc = vc_cons[unit].d;
796 int oldidx = con2fb_map[unit];
797 struct fb_info *info = registered_fb[newidx];
798 struct fb_info *oldinfo = NULL;
799 int found, err = 0;
800
801 if (oldidx == newidx)
802 return 0;
803
804 if (!info || fbcon_has_exited)
805 return -EINVAL;
806
807 if (!err && !search_for_mapped_con()) {
808 info_idx = newidx;
809 return fbcon_takeover(0);
810 }
811
812 if (oldidx != -1)
813 oldinfo = registered_fb[oldidx];
814
815 found = search_fb_in_map(newidx);
816
817 acquire_console_sem();
818 con2fb_map[unit] = newidx;
819 if (!err && !found)
820 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
821
822
823 /*
824 * If old fb is not mapped to any of the consoles,
825 * fbcon should release it.
826 */
827 if (!err && oldinfo && !search_fb_in_map(oldidx))
828 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
829 found);
830
831 if (!err) {
832 int show_logo = (fg_console == 0 && !user &&
833 logo_shown != FBCON_LOGO_DONTSHOW);
834
835 if (!found)
836 fbcon_add_cursor_timer(info);
837 con2fb_map_boot[unit] = newidx;
838 con2fb_init_display(vc, info, unit, show_logo);
839 }
840
841 if (!search_fb_in_map(info_idx))
842 info_idx = newidx;
843
844 release_console_sem();
845 return err;
846 }
847
848 /*
849 * Low Level Operations
850 */
851 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
852 static int var_to_display(struct display *disp,
853 struct fb_var_screeninfo *var,
854 struct fb_info *info)
855 {
856 disp->xres_virtual = var->xres_virtual;
857 disp->yres_virtual = var->yres_virtual;
858 disp->bits_per_pixel = var->bits_per_pixel;
859 disp->grayscale = var->grayscale;
860 disp->nonstd = var->nonstd;
861 disp->accel_flags = var->accel_flags;
862 disp->height = var->height;
863 disp->width = var->width;
864 disp->red = var->red;
865 disp->green = var->green;
866 disp->blue = var->blue;
867 disp->transp = var->transp;
868 disp->rotate = var->rotate;
869 disp->mode = fb_match_mode(var, &info->modelist);
870 if (disp->mode == NULL)
871 /* This should not happen */
872 return -EINVAL;
873 return 0;
874 }
875
876 static void display_to_var(struct fb_var_screeninfo *var,
877 struct display *disp)
878 {
879 fb_videomode_to_var(var, disp->mode);
880 var->xres_virtual = disp->xres_virtual;
881 var->yres_virtual = disp->yres_virtual;
882 var->bits_per_pixel = disp->bits_per_pixel;
883 var->grayscale = disp->grayscale;
884 var->nonstd = disp->nonstd;
885 var->accel_flags = disp->accel_flags;
886 var->height = disp->height;
887 var->width = disp->width;
888 var->red = disp->red;
889 var->green = disp->green;
890 var->blue = disp->blue;
891 var->transp = disp->transp;
892 var->rotate = disp->rotate;
893 }
894
895 static const char *fbcon_startup(void)
896 {
897 const char *display_desc = "frame buffer device";
898 struct display *p = &fb_display[fg_console];
899 struct vc_data *vc = vc_cons[fg_console].d;
900 const struct font_desc *font = NULL;
901 struct module *owner;
902 struct fb_info *info = NULL;
903 struct fbcon_ops *ops;
904 int rows, cols;
905 int irqres;
906
907 irqres = 1;
908 /*
909 * If num_registered_fb is zero, this is a call for the dummy part.
910 * The frame buffer devices weren't initialized yet.
911 */
912 if (!num_registered_fb || info_idx == -1)
913 return display_desc;
914 /*
915 * Instead of blindly using registered_fb[0], we use info_idx, set by
916 * fb_console_init();
917 */
918 info = registered_fb[info_idx];
919 if (!info)
920 return NULL;
921
922 owner = info->fbops->owner;
923 if (!try_module_get(owner))
924 return NULL;
925 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
926 module_put(owner);
927 return NULL;
928 }
929
930 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
931 if (!ops) {
932 module_put(owner);
933 return NULL;
934 }
935
936 ops->currcon = -1;
937 ops->graphics = 1;
938 ops->cur_rotate = -1;
939 info->fbcon_par = ops;
940 p->con_rotate = rotate;
941 set_blitting_type(vc, info);
942
943 if (info->fix.type != FB_TYPE_TEXT) {
944 if (fbcon_softback_size) {
945 if (!softback_buf) {
946 softback_buf =
947 (unsigned long)
948 kmalloc(fbcon_softback_size,
949 GFP_KERNEL);
950 if (!softback_buf) {
951 fbcon_softback_size = 0;
952 softback_top = 0;
953 }
954 }
955 } else {
956 if (softback_buf) {
957 kfree((void *) softback_buf);
958 softback_buf = 0;
959 softback_top = 0;
960 }
961 }
962 if (softback_buf)
963 softback_in = softback_top = softback_curr =
964 softback_buf;
965 softback_lines = 0;
966 }
967
968 /* Setup default font */
969 if (!p->fontdata) {
970 if (!fontname[0] || !(font = find_font(fontname)))
971 font = get_default_font(info->var.xres,
972 info->var.yres);
973 vc->vc_font.width = font->width;
974 vc->vc_font.height = font->height;
975 vc->vc_font.data = (void *)(p->fontdata = font->data);
976 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
977 }
978
979 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
980 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
981 cols /= vc->vc_font.width;
982 rows /= vc->vc_font.height;
983 vc_resize(vc, cols, rows);
984
985 DPRINTK("mode: %s\n", info->fix.id);
986 DPRINTK("visual: %d\n", info->fix.visual);
987 DPRINTK("res: %dx%d-%d\n", info->var.xres,
988 info->var.yres,
989 info->var.bits_per_pixel);
990
991 #ifdef CONFIG_ATARI
992 if (MACH_IS_ATARI) {
993 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
994 irqres =
995 request_irq(IRQ_AUTO_4, fb_vbl_handler,
996 IRQ_TYPE_PRIO, "framebuffer vbl",
997 info);
998 }
999 #endif /* CONFIG_ATARI */
1000
1001 #ifdef CONFIG_MAC
1002 /*
1003 * On a Macintoy, the VBL interrupt may or may not be active.
1004 * As interrupt based cursor is more reliable and race free, we
1005 * probe for VBL interrupts.
1006 */
1007 if (MACH_IS_MAC) {
1008 int ct = 0;
1009 /*
1010 * Probe for VBL: set temp. handler ...
1011 */
1012 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1013 "framebuffer vbl", info);
1014 vbl_detected = 0;
1015
1016 /*
1017 * ... and spin for 20 ms ...
1018 */
1019 while (!vbl_detected && ++ct < 1000)
1020 udelay(20);
1021
1022 if (ct == 1000)
1023 printk
1024 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1025
1026 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1027
1028 if (vbl_detected) {
1029 /*
1030 * interrupt based cursor ok
1031 */
1032 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1033 irqres =
1034 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1035 "framebuffer vbl", info);
1036 } else {
1037 /*
1038 * VBL not detected: fall through, use timer based cursor
1039 */
1040 irqres = 1;
1041 }
1042 }
1043 #endif /* CONFIG_MAC */
1044
1045 fbcon_add_cursor_timer(info);
1046 fbcon_has_exited = 0;
1047 return display_desc;
1048 }
1049
1050 static void fbcon_init(struct vc_data *vc, int init)
1051 {
1052 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1053 struct fbcon_ops *ops;
1054 struct vc_data **default_mode = vc->vc_display_fg;
1055 struct vc_data *svc = *default_mode;
1056 struct display *t, *p = &fb_display[vc->vc_num];
1057 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1058 int cap;
1059
1060 if (info_idx == -1 || info == NULL)
1061 return;
1062
1063 cap = info->flags;
1064
1065 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1066 (info->fix.type == FB_TYPE_TEXT))
1067 logo = 0;
1068
1069 if (var_to_display(p, &info->var, info))
1070 return;
1071
1072 /* If we are not the first console on this
1073 fb, copy the font from that console */
1074 t = &fb_display[fg_console];
1075 if (!p->fontdata) {
1076 if (t->fontdata) {
1077 struct vc_data *fvc = vc_cons[fg_console].d;
1078
1079 vc->vc_font.data = (void *)(p->fontdata =
1080 fvc->vc_font.data);
1081 vc->vc_font.width = fvc->vc_font.width;
1082 vc->vc_font.height = fvc->vc_font.height;
1083 p->userfont = t->userfont;
1084
1085 if (p->userfont)
1086 REFCOUNT(p->fontdata)++;
1087 } else {
1088 const struct font_desc *font = NULL;
1089
1090 if (!fontname[0] || !(font = find_font(fontname)))
1091 font = get_default_font(info->var.xres,
1092 info->var.yres);
1093 vc->vc_font.width = font->width;
1094 vc->vc_font.height = font->height;
1095 vc->vc_font.data = (void *)(p->fontdata = font->data);
1096 vc->vc_font.charcount = 256; /* FIXME Need to
1097 support more fonts */
1098 }
1099 }
1100
1101 if (p->userfont)
1102 charcnt = FNTCHARCNT(p->fontdata);
1103
1104 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1105 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1106 if (charcnt == 256) {
1107 vc->vc_hi_font_mask = 0;
1108 } else {
1109 vc->vc_hi_font_mask = 0x100;
1110 if (vc->vc_can_do_color)
1111 vc->vc_complement_mask <<= 1;
1112 }
1113
1114 if (!*svc->vc_uni_pagedir_loc)
1115 con_set_default_unimap(svc);
1116 if (!*vc->vc_uni_pagedir_loc)
1117 con_copy_unimap(vc, svc);
1118
1119 ops = info->fbcon_par;
1120 p->con_rotate = rotate;
1121 set_blitting_type(vc, info);
1122
1123 cols = vc->vc_cols;
1124 rows = vc->vc_rows;
1125 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1126 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1127 new_cols /= vc->vc_font.width;
1128 new_rows /= vc->vc_font.height;
1129 vc_resize(vc, new_cols, new_rows);
1130
1131 /*
1132 * We must always set the mode. The mode of the previous console
1133 * driver could be in the same resolution but we are using different
1134 * hardware so we have to initialize the hardware.
1135 *
1136 * We need to do it in fbcon_init() to prevent screen corruption.
1137 */
1138 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1139 if (info->fbops->fb_set_par &&
1140 !(ops->flags & FBCON_FLAGS_INIT))
1141 info->fbops->fb_set_par(info);
1142 ops->flags |= FBCON_FLAGS_INIT;
1143 }
1144
1145 ops->graphics = 0;
1146
1147 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1148 !(cap & FBINFO_HWACCEL_DISABLED))
1149 p->scrollmode = SCROLL_MOVE;
1150 else /* default to something safe */
1151 p->scrollmode = SCROLL_REDRAW;
1152
1153 /*
1154 * ++guenther: console.c:vc_allocate() relies on initializing
1155 * vc_{cols,rows}, but we must not set those if we are only
1156 * resizing the console.
1157 */
1158 if (!init) {
1159 vc->vc_cols = new_cols;
1160 vc->vc_rows = new_rows;
1161 }
1162
1163 if (logo)
1164 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1165
1166 if (vc == svc && softback_buf)
1167 fbcon_update_softback(vc);
1168
1169 if (ops->rotate_font && ops->rotate_font(info, vc)) {
1170 ops->rotate = FB_ROTATE_UR;
1171 set_blitting_type(vc, info);
1172 }
1173
1174 ops->p = &fb_display[fg_console];
1175 }
1176
1177 static void fbcon_free_font(struct display *p)
1178 {
1179 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1180 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1181 p->fontdata = NULL;
1182 p->userfont = 0;
1183 }
1184
1185 static void fbcon_deinit(struct vc_data *vc)
1186 {
1187 struct display *p = &fb_display[vc->vc_num];
1188 struct fb_info *info;
1189 struct fbcon_ops *ops;
1190 int idx;
1191
1192 fbcon_free_font(p);
1193 idx = con2fb_map[vc->vc_num];
1194
1195 if (idx == -1)
1196 goto finished;
1197
1198 info = registered_fb[idx];
1199
1200 if (!info)
1201 goto finished;
1202
1203 ops = info->fbcon_par;
1204
1205 if (!ops)
1206 goto finished;
1207
1208 if (CON_IS_VISIBLE(vc))
1209 fbcon_del_cursor_timer(info);
1210
1211 ops->flags &= ~FBCON_FLAGS_INIT;
1212 finished:
1213
1214 if (!con_is_bound(&fb_con))
1215 fbcon_exit();
1216
1217 return;
1218 }
1219
1220 /* ====================================================================== */
1221
1222 /* fbcon_XXX routines - interface used by the world
1223 *
1224 * This system is now divided into two levels because of complications
1225 * caused by hardware scrolling. Top level functions:
1226 *
1227 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1228 *
1229 * handles y values in range [0, scr_height-1] that correspond to real
1230 * screen positions. y_wrap shift means that first line of bitmap may be
1231 * anywhere on this display. These functions convert lineoffsets to
1232 * bitmap offsets and deal with the wrap-around case by splitting blits.
1233 *
1234 * fbcon_bmove_physical_8() -- These functions fast implementations
1235 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1236 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1237 *
1238 * WARNING:
1239 *
1240 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1241 * Implies should only really hardware scroll in rows. Only reason for
1242 * restriction is simplicity & efficiency at the moment.
1243 */
1244
1245 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1246 int width)
1247 {
1248 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1249 struct fbcon_ops *ops = info->fbcon_par;
1250
1251 struct display *p = &fb_display[vc->vc_num];
1252 u_int y_break;
1253
1254 if (fbcon_is_inactive(vc, info))
1255 return;
1256
1257 if (!height || !width)
1258 return;
1259
1260 /* Split blits that cross physical y_wrap boundary */
1261
1262 y_break = p->vrows - p->yscroll;
1263 if (sy < y_break && sy + height - 1 >= y_break) {
1264 u_int b = y_break - sy;
1265 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1266 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1267 width);
1268 } else
1269 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1270 }
1271
1272 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1273 int count, int ypos, int xpos)
1274 {
1275 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1276 struct display *p = &fb_display[vc->vc_num];
1277 struct fbcon_ops *ops = info->fbcon_par;
1278
1279 if (!fbcon_is_inactive(vc, info))
1280 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1281 get_color(vc, info, scr_readw(s), 1),
1282 get_color(vc, info, scr_readw(s), 0));
1283 }
1284
1285 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1286 {
1287 unsigned short chr;
1288
1289 scr_writew(c, &chr);
1290 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1291 }
1292
1293 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1294 {
1295 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1296 struct fbcon_ops *ops = info->fbcon_par;
1297
1298 if (!fbcon_is_inactive(vc, info))
1299 ops->clear_margins(vc, info, bottom_only);
1300 }
1301
1302 static void fbcon_cursor(struct vc_data *vc, int mode)
1303 {
1304 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1305 struct fbcon_ops *ops = info->fbcon_par;
1306 int y;
1307 int c = scr_readw((u16 *) vc->vc_pos);
1308
1309 if (fbcon_is_inactive(vc, info))
1310 return;
1311
1312 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1313 if (mode & CM_SOFTBACK) {
1314 mode &= ~CM_SOFTBACK;
1315 y = softback_lines;
1316 } else {
1317 if (softback_lines)
1318 fbcon_set_origin(vc);
1319 y = 0;
1320 }
1321
1322 ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1323 get_color(vc, info, c, 0));
1324 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1325 }
1326
1327 static int scrollback_phys_max = 0;
1328 static int scrollback_max = 0;
1329 static int scrollback_current = 0;
1330
1331 /*
1332 * If no vc is existent yet, just set struct display
1333 */
1334 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1335 int unit)
1336 {
1337 struct display *p = &fb_display[unit];
1338 struct display *t = &fb_display[fg_console];
1339
1340 if (var_to_display(p, var, info))
1341 return;
1342
1343 p->fontdata = t->fontdata;
1344 p->userfont = t->userfont;
1345 if (p->userfont)
1346 REFCOUNT(p->fontdata)++;
1347 }
1348
1349 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1350 struct vc_data *vc)
1351 {
1352 struct display *p = &fb_display[vc->vc_num], *t;
1353 struct vc_data **default_mode = vc->vc_display_fg;
1354 struct vc_data *svc = *default_mode;
1355 struct fbcon_ops *ops = info->fbcon_par;
1356 int rows, cols, charcnt = 256;
1357
1358 if (var_to_display(p, var, info))
1359 return;
1360 t = &fb_display[svc->vc_num];
1361 if (!vc->vc_font.data) {
1362 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1363 vc->vc_font.width = (*default_mode)->vc_font.width;
1364 vc->vc_font.height = (*default_mode)->vc_font.height;
1365 p->userfont = t->userfont;
1366 if (p->userfont)
1367 REFCOUNT(p->fontdata)++;
1368 }
1369 if (p->userfont)
1370 charcnt = FNTCHARCNT(p->fontdata);
1371
1372 var->activate = FB_ACTIVATE_NOW;
1373 info->var.activate = var->activate;
1374 var->yoffset = info->var.yoffset;
1375 var->xoffset = info->var.xoffset;
1376 fb_set_var(info, var);
1377 ops->var = info->var;
1378 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1379 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1380 if (charcnt == 256) {
1381 vc->vc_hi_font_mask = 0;
1382 } else {
1383 vc->vc_hi_font_mask = 0x100;
1384 if (vc->vc_can_do_color)
1385 vc->vc_complement_mask <<= 1;
1386 }
1387
1388 if (!*svc->vc_uni_pagedir_loc)
1389 con_set_default_unimap(svc);
1390 if (!*vc->vc_uni_pagedir_loc)
1391 con_copy_unimap(vc, svc);
1392
1393 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1394 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1395 cols /= vc->vc_font.width;
1396 rows /= vc->vc_font.height;
1397 vc_resize(vc, cols, rows);
1398
1399 if (CON_IS_VISIBLE(vc)) {
1400 update_screen(vc);
1401 if (softback_buf)
1402 fbcon_update_softback(vc);
1403 }
1404 }
1405
1406 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1407 {
1408 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1409 struct fbcon_ops *ops = info->fbcon_par;
1410 struct display *p = &fb_display[vc->vc_num];
1411
1412 p->yscroll += count;
1413 if (p->yscroll >= p->vrows) /* Deal with wrap */
1414 p->yscroll -= p->vrows;
1415 ops->var.xoffset = 0;
1416 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1417 ops->var.vmode |= FB_VMODE_YWRAP;
1418 ops->update_start(info);
1419 scrollback_max += count;
1420 if (scrollback_max > scrollback_phys_max)
1421 scrollback_max = scrollback_phys_max;
1422 scrollback_current = 0;
1423 }
1424
1425 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1426 {
1427 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1428 struct fbcon_ops *ops = info->fbcon_par;
1429 struct display *p = &fb_display[vc->vc_num];
1430
1431 p->yscroll -= count;
1432 if (p->yscroll < 0) /* Deal with wrap */
1433 p->yscroll += p->vrows;
1434 ops->var.xoffset = 0;
1435 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1436 ops->var.vmode |= FB_VMODE_YWRAP;
1437 ops->update_start(info);
1438 scrollback_max -= count;
1439 if (scrollback_max < 0)
1440 scrollback_max = 0;
1441 scrollback_current = 0;
1442 }
1443
1444 static __inline__ void ypan_up(struct vc_data *vc, int count)
1445 {
1446 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1447 struct display *p = &fb_display[vc->vc_num];
1448 struct fbcon_ops *ops = info->fbcon_par;
1449
1450 p->yscroll += count;
1451 if (p->yscroll > p->vrows - vc->vc_rows) {
1452 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1453 0, 0, 0, vc->vc_rows, vc->vc_cols);
1454 p->yscroll -= p->vrows - vc->vc_rows;
1455 }
1456
1457 ops->var.xoffset = 0;
1458 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1459 ops->var.vmode &= ~FB_VMODE_YWRAP;
1460 ops->update_start(info);
1461 fbcon_clear_margins(vc, 1);
1462 scrollback_max += count;
1463 if (scrollback_max > scrollback_phys_max)
1464 scrollback_max = scrollback_phys_max;
1465 scrollback_current = 0;
1466 }
1467
1468 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1469 {
1470 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1471 struct fbcon_ops *ops = info->fbcon_par;
1472 struct display *p = &fb_display[vc->vc_num];
1473
1474 p->yscroll += count;
1475
1476 if (p->yscroll > p->vrows - vc->vc_rows) {
1477 p->yscroll -= p->vrows - vc->vc_rows;
1478 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1479 }
1480
1481 ops->var.xoffset = 0;
1482 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1483 ops->var.vmode &= ~FB_VMODE_YWRAP;
1484 ops->update_start(info);
1485 fbcon_clear_margins(vc, 1);
1486 scrollback_max += count;
1487 if (scrollback_max > scrollback_phys_max)
1488 scrollback_max = scrollback_phys_max;
1489 scrollback_current = 0;
1490 }
1491
1492 static __inline__ void ypan_down(struct vc_data *vc, int count)
1493 {
1494 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1495 struct display *p = &fb_display[vc->vc_num];
1496 struct fbcon_ops *ops = info->fbcon_par;
1497
1498 p->yscroll -= count;
1499 if (p->yscroll < 0) {
1500 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1501 0, vc->vc_rows, vc->vc_cols);
1502 p->yscroll += p->vrows - vc->vc_rows;
1503 }
1504
1505 ops->var.xoffset = 0;
1506 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1507 ops->var.vmode &= ~FB_VMODE_YWRAP;
1508 ops->update_start(info);
1509 fbcon_clear_margins(vc, 1);
1510 scrollback_max -= count;
1511 if (scrollback_max < 0)
1512 scrollback_max = 0;
1513 scrollback_current = 0;
1514 }
1515
1516 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1517 {
1518 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1519 struct fbcon_ops *ops = info->fbcon_par;
1520 struct display *p = &fb_display[vc->vc_num];
1521
1522 p->yscroll -= count;
1523
1524 if (p->yscroll < 0) {
1525 p->yscroll += p->vrows - vc->vc_rows;
1526 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1527 }
1528
1529 ops->var.xoffset = 0;
1530 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1531 ops->var.vmode &= ~FB_VMODE_YWRAP;
1532 ops->update_start(info);
1533 fbcon_clear_margins(vc, 1);
1534 scrollback_max -= count;
1535 if (scrollback_max < 0)
1536 scrollback_max = 0;
1537 scrollback_current = 0;
1538 }
1539
1540 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1541 long delta)
1542 {
1543 int count = vc->vc_rows;
1544 unsigned short *d, *s;
1545 unsigned long n;
1546 int line = 0;
1547
1548 d = (u16 *) softback_curr;
1549 if (d == (u16 *) softback_in)
1550 d = (u16 *) vc->vc_origin;
1551 n = softback_curr + delta * vc->vc_size_row;
1552 softback_lines -= delta;
1553 if (delta < 0) {
1554 if (softback_curr < softback_top && n < softback_buf) {
1555 n += softback_end - softback_buf;
1556 if (n < softback_top) {
1557 softback_lines -=
1558 (softback_top - n) / vc->vc_size_row;
1559 n = softback_top;
1560 }
1561 } else if (softback_curr >= softback_top
1562 && n < softback_top) {
1563 softback_lines -=
1564 (softback_top - n) / vc->vc_size_row;
1565 n = softback_top;
1566 }
1567 } else {
1568 if (softback_curr > softback_in && n >= softback_end) {
1569 n += softback_buf - softback_end;
1570 if (n > softback_in) {
1571 n = softback_in;
1572 softback_lines = 0;
1573 }
1574 } else if (softback_curr <= softback_in && n > softback_in) {
1575 n = softback_in;
1576 softback_lines = 0;
1577 }
1578 }
1579 if (n == softback_curr)
1580 return;
1581 softback_curr = n;
1582 s = (u16 *) softback_curr;
1583 if (s == (u16 *) softback_in)
1584 s = (u16 *) vc->vc_origin;
1585 while (count--) {
1586 unsigned short *start;
1587 unsigned short *le;
1588 unsigned short c;
1589 int x = 0;
1590 unsigned short attr = 1;
1591
1592 start = s;
1593 le = advance_row(s, 1);
1594 do {
1595 c = scr_readw(s);
1596 if (attr != (c & 0xff00)) {
1597 attr = c & 0xff00;
1598 if (s > start) {
1599 fbcon_putcs(vc, start, s - start,
1600 line, x);
1601 x += s - start;
1602 start = s;
1603 }
1604 }
1605 if (c == scr_readw(d)) {
1606 if (s > start) {
1607 fbcon_putcs(vc, start, s - start,
1608 line, x);
1609 x += s - start + 1;
1610 start = s + 1;
1611 } else {
1612 x++;
1613 start++;
1614 }
1615 }
1616 s++;
1617 d++;
1618 } while (s < le);
1619 if (s > start)
1620 fbcon_putcs(vc, start, s - start, line, x);
1621 line++;
1622 if (d == (u16 *) softback_end)
1623 d = (u16 *) softback_buf;
1624 if (d == (u16 *) softback_in)
1625 d = (u16 *) vc->vc_origin;
1626 if (s == (u16 *) softback_end)
1627 s = (u16 *) softback_buf;
1628 if (s == (u16 *) softback_in)
1629 s = (u16 *) vc->vc_origin;
1630 }
1631 }
1632
1633 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1634 int line, int count, int dy)
1635 {
1636 unsigned short *s = (unsigned short *)
1637 (vc->vc_origin + vc->vc_size_row * line);
1638
1639 while (count--) {
1640 unsigned short *start = s;
1641 unsigned short *le = advance_row(s, 1);
1642 unsigned short c;
1643 int x = 0;
1644 unsigned short attr = 1;
1645
1646 do {
1647 c = scr_readw(s);
1648 if (attr != (c & 0xff00)) {
1649 attr = c & 0xff00;
1650 if (s > start) {
1651 fbcon_putcs(vc, start, s - start,
1652 dy, x);
1653 x += s - start;
1654 start = s;
1655 }
1656 }
1657 console_conditional_schedule();
1658 s++;
1659 } while (s < le);
1660 if (s > start)
1661 fbcon_putcs(vc, start, s - start, dy, x);
1662 console_conditional_schedule();
1663 dy++;
1664 }
1665 }
1666
1667 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1668 int line, int count, int offset)
1669 {
1670 unsigned short *d = (unsigned short *)
1671 (vc->vc_origin + vc->vc_size_row * line);
1672 unsigned short *s = d + offset;
1673
1674 while (count--) {
1675 unsigned short *start = s;
1676 unsigned short *le = advance_row(s, 1);
1677 unsigned short c;
1678 int x = 0;
1679 unsigned short attr = 1;
1680
1681 do {
1682 c = scr_readw(s);
1683 if (attr != (c & 0xff00)) {
1684 attr = c & 0xff00;
1685 if (s > start) {
1686 fbcon_putcs(vc, start, s - start,
1687 line, x);
1688 x += s - start;
1689 start = s;
1690 }
1691 }
1692 if (c == scr_readw(d)) {
1693 if (s > start) {
1694 fbcon_putcs(vc, start, s - start,
1695 line, x);
1696 x += s - start + 1;
1697 start = s + 1;
1698 } else {
1699 x++;
1700 start++;
1701 }
1702 }
1703 scr_writew(c, d);
1704 console_conditional_schedule();
1705 s++;
1706 d++;
1707 } while (s < le);
1708 if (s > start)
1709 fbcon_putcs(vc, start, s - start, line, x);
1710 console_conditional_schedule();
1711 if (offset > 0)
1712 line++;
1713 else {
1714 line--;
1715 /* NOTE: We subtract two lines from these pointers */
1716 s -= vc->vc_size_row;
1717 d -= vc->vc_size_row;
1718 }
1719 }
1720 }
1721
1722 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1723 int count)
1724 {
1725 unsigned short *p;
1726
1727 if (vc->vc_num != fg_console)
1728 return;
1729 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1730
1731 while (count) {
1732 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1733 count--;
1734 p = advance_row(p, 1);
1735 softback_in += vc->vc_size_row;
1736 if (softback_in == softback_end)
1737 softback_in = softback_buf;
1738 if (softback_in == softback_top) {
1739 softback_top += vc->vc_size_row;
1740 if (softback_top == softback_end)
1741 softback_top = softback_buf;
1742 }
1743 }
1744 softback_curr = softback_in;
1745 }
1746
1747 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1748 int count)
1749 {
1750 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1751 struct display *p = &fb_display[vc->vc_num];
1752 struct fbcon_ops *ops = info->fbcon_par;
1753 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1754
1755 if (fbcon_is_inactive(vc, info))
1756 return -EINVAL;
1757
1758 fbcon_cursor(vc, CM_ERASE);
1759
1760 /*
1761 * ++Geert: Only use ywrap/ypan if the console is in text mode
1762 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1763 * whole screen (prevents flicker).
1764 */
1765
1766 switch (dir) {
1767 case SM_UP:
1768 if (count > vc->vc_rows) /* Maximum realistic size */
1769 count = vc->vc_rows;
1770 if (softback_top)
1771 fbcon_softback_note(vc, t, count);
1772 if (logo_shown >= 0)
1773 goto redraw_up;
1774 switch (p->scrollmode) {
1775 case SCROLL_MOVE:
1776 ops->bmove(vc, info, t + count, 0, t, 0,
1777 b - t - count, vc->vc_cols);
1778 ops->clear(vc, info, b - count, 0, count,
1779 vc->vc_cols);
1780 break;
1781
1782 case SCROLL_WRAP_MOVE:
1783 if (b - t - count > 3 * vc->vc_rows >> 2) {
1784 if (t > 0)
1785 fbcon_bmove(vc, 0, 0, count, 0, t,
1786 vc->vc_cols);
1787 ywrap_up(vc, count);
1788 if (vc->vc_rows - b > 0)
1789 fbcon_bmove(vc, b - count, 0, b, 0,
1790 vc->vc_rows - b,
1791 vc->vc_cols);
1792 } else if (info->flags & FBINFO_READS_FAST)
1793 fbcon_bmove(vc, t + count, 0, t, 0,
1794 b - t - count, vc->vc_cols);
1795 else
1796 goto redraw_up;
1797 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1798 break;
1799
1800 case SCROLL_PAN_REDRAW:
1801 if ((p->yscroll + count <=
1802 2 * (p->vrows - vc->vc_rows))
1803 && ((!scroll_partial && (b - t == vc->vc_rows))
1804 || (scroll_partial
1805 && (b - t - count >
1806 3 * vc->vc_rows >> 2)))) {
1807 if (t > 0)
1808 fbcon_redraw_move(vc, p, 0, t, count);
1809 ypan_up_redraw(vc, t, count);
1810 if (vc->vc_rows - b > 0)
1811 fbcon_redraw_move(vc, p, b,
1812 vc->vc_rows - b, b);
1813 } else
1814 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1815 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1816 break;
1817
1818 case SCROLL_PAN_MOVE:
1819 if ((p->yscroll + count <=
1820 2 * (p->vrows - vc->vc_rows))
1821 && ((!scroll_partial && (b - t == vc->vc_rows))
1822 || (scroll_partial
1823 && (b - t - count >
1824 3 * vc->vc_rows >> 2)))) {
1825 if (t > 0)
1826 fbcon_bmove(vc, 0, 0, count, 0, t,
1827 vc->vc_cols);
1828 ypan_up(vc, count);
1829 if (vc->vc_rows - b > 0)
1830 fbcon_bmove(vc, b - count, 0, b, 0,
1831 vc->vc_rows - b,
1832 vc->vc_cols);
1833 } else if (info->flags & FBINFO_READS_FAST)
1834 fbcon_bmove(vc, t + count, 0, t, 0,
1835 b - t - count, vc->vc_cols);
1836 else
1837 goto redraw_up;
1838 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1839 break;
1840
1841 case SCROLL_REDRAW:
1842 redraw_up:
1843 fbcon_redraw(vc, p, t, b - t - count,
1844 count * vc->vc_cols);
1845 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1846 scr_memsetw((unsigned short *) (vc->vc_origin +
1847 vc->vc_size_row *
1848 (b - count)),
1849 vc->vc_video_erase_char,
1850 vc->vc_size_row * count);
1851 return 1;
1852 }
1853 break;
1854
1855 case SM_DOWN:
1856 if (count > vc->vc_rows) /* Maximum realistic size */
1857 count = vc->vc_rows;
1858 if (logo_shown >= 0)
1859 goto redraw_down;
1860 switch (p->scrollmode) {
1861 case SCROLL_MOVE:
1862 ops->bmove(vc, info, t, 0, t + count, 0,
1863 b - t - count, vc->vc_cols);
1864 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1865 break;
1866
1867 case SCROLL_WRAP_MOVE:
1868 if (b - t - count > 3 * vc->vc_rows >> 2) {
1869 if (vc->vc_rows - b > 0)
1870 fbcon_bmove(vc, b, 0, b - count, 0,
1871 vc->vc_rows - b,
1872 vc->vc_cols);
1873 ywrap_down(vc, count);
1874 if (t > 0)
1875 fbcon_bmove(vc, count, 0, 0, 0, t,
1876 vc->vc_cols);
1877 } else if (info->flags & FBINFO_READS_FAST)
1878 fbcon_bmove(vc, t, 0, t + count, 0,
1879 b - t - count, vc->vc_cols);
1880 else
1881 goto redraw_down;
1882 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1883 break;
1884
1885 case SCROLL_PAN_MOVE:
1886 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1887 && ((!scroll_partial && (b - t == vc->vc_rows))
1888 || (scroll_partial
1889 && (b - t - count >
1890 3 * vc->vc_rows >> 2)))) {
1891 if (vc->vc_rows - b > 0)
1892 fbcon_bmove(vc, b, 0, b - count, 0,
1893 vc->vc_rows - b,
1894 vc->vc_cols);
1895 ypan_down(vc, count);
1896 if (t > 0)
1897 fbcon_bmove(vc, count, 0, 0, 0, t,
1898 vc->vc_cols);
1899 } else if (info->flags & FBINFO_READS_FAST)
1900 fbcon_bmove(vc, t, 0, t + count, 0,
1901 b - t - count, vc->vc_cols);
1902 else
1903 goto redraw_down;
1904 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1905 break;
1906
1907 case SCROLL_PAN_REDRAW:
1908 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1909 && ((!scroll_partial && (b - t == vc->vc_rows))
1910 || (scroll_partial
1911 && (b - t - count >
1912 3 * vc->vc_rows >> 2)))) {
1913 if (vc->vc_rows - b > 0)
1914 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1915 b - count);
1916 ypan_down_redraw(vc, t, count);
1917 if (t > 0)
1918 fbcon_redraw_move(vc, p, count, t, 0);
1919 } else
1920 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1921 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1922 break;
1923
1924 case SCROLL_REDRAW:
1925 redraw_down:
1926 fbcon_redraw(vc, p, b - 1, b - t - count,
1927 -count * vc->vc_cols);
1928 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1929 scr_memsetw((unsigned short *) (vc->vc_origin +
1930 vc->vc_size_row *
1931 t),
1932 vc->vc_video_erase_char,
1933 vc->vc_size_row * count);
1934 return 1;
1935 }
1936 }
1937 return 0;
1938 }
1939
1940
1941 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1942 int height, int width)
1943 {
1944 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1945 struct display *p = &fb_display[vc->vc_num];
1946
1947 if (fbcon_is_inactive(vc, info))
1948 return;
1949
1950 if (!width || !height)
1951 return;
1952
1953 /* Split blits that cross physical y_wrap case.
1954 * Pathological case involves 4 blits, better to use recursive
1955 * code rather than unrolled case
1956 *
1957 * Recursive invocations don't need to erase the cursor over and
1958 * over again, so we use fbcon_bmove_rec()
1959 */
1960 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1961 p->vrows - p->yscroll);
1962 }
1963
1964 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1965 int dy, int dx, int height, int width, u_int y_break)
1966 {
1967 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1968 struct fbcon_ops *ops = info->fbcon_par;
1969 u_int b;
1970
1971 if (sy < y_break && sy + height > y_break) {
1972 b = y_break - sy;
1973 if (dy < sy) { /* Avoid trashing self */
1974 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1975 y_break);
1976 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1977 height - b, width, y_break);
1978 } else {
1979 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1980 height - b, width, y_break);
1981 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1982 y_break);
1983 }
1984 return;
1985 }
1986
1987 if (dy < y_break && dy + height > y_break) {
1988 b = y_break - dy;
1989 if (dy < sy) { /* Avoid trashing self */
1990 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1991 y_break);
1992 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1993 height - b, width, y_break);
1994 } else {
1995 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1996 height - b, width, y_break);
1997 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1998 y_break);
1999 }
2000 return;
2001 }
2002 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2003 height, width);
2004 }
2005
2006 static __inline__ void updatescrollmode(struct display *p,
2007 struct fb_info *info,
2008 struct vc_data *vc)
2009 {
2010 struct fbcon_ops *ops = info->fbcon_par;
2011 int fh = vc->vc_font.height;
2012 int cap = info->flags;
2013 u16 t = 0;
2014 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2015 info->fix.xpanstep);
2016 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2017 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2018 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2019 info->var.xres_virtual);
2020 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2021 divides(ypan, vc->vc_font.height) && vyres > yres;
2022 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2023 divides(ywrap, vc->vc_font.height) &&
2024 divides(vc->vc_font.height, vyres) &&
2025 divides(vc->vc_font.height, yres);
2026 int reading_fast = cap & FBINFO_READS_FAST;
2027 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2028 !(cap & FBINFO_HWACCEL_DISABLED);
2029 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2030 !(cap & FBINFO_HWACCEL_DISABLED);
2031
2032 p->vrows = vyres/fh;
2033 if (yres > (fh * (vc->vc_rows + 1)))
2034 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2035 if ((yres % fh) && (vyres % fh < yres % fh))
2036 p->vrows--;
2037
2038 if (good_wrap || good_pan) {
2039 if (reading_fast || fast_copyarea)
2040 p->scrollmode = good_wrap ?
2041 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2042 else
2043 p->scrollmode = good_wrap ? SCROLL_REDRAW :
2044 SCROLL_PAN_REDRAW;
2045 } else {
2046 if (reading_fast || (fast_copyarea && !fast_imageblit))
2047 p->scrollmode = SCROLL_MOVE;
2048 else
2049 p->scrollmode = SCROLL_REDRAW;
2050 }
2051 }
2052
2053 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2054 unsigned int height)
2055 {
2056 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2057 struct fbcon_ops *ops = info->fbcon_par;
2058 struct display *p = &fb_display[vc->vc_num];
2059 struct fb_var_screeninfo var = info->var;
2060 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2061
2062 virt_w = FBCON_SWAP(ops->rotate, width, height);
2063 virt_h = FBCON_SWAP(ops->rotate, height, width);
2064 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2065 vc->vc_font.height);
2066 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2067 vc->vc_font.width);
2068 var.xres = virt_w * virt_fw;
2069 var.yres = virt_h * virt_fh;
2070 x_diff = info->var.xres - var.xres;
2071 y_diff = info->var.yres - var.yres;
2072 if (x_diff < 0 || x_diff > virt_fw ||
2073 y_diff < 0 || y_diff > virt_fh) {
2074 struct fb_videomode *mode;
2075
2076 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2077 mode = fb_find_best_mode(&var, &info->modelist);
2078 if (mode == NULL)
2079 return -EINVAL;
2080 display_to_var(&var, p);
2081 fb_videomode_to_var(&var, mode);
2082
2083 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2084 return -EINVAL;
2085
2086 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2087 if (CON_IS_VISIBLE(vc)) {
2088 var.activate = FB_ACTIVATE_NOW |
2089 FB_ACTIVATE_FORCE;
2090 fb_set_var(info, &var);
2091 }
2092 var_to_display(p, &info->var, info);
2093 ops->var = info->var;
2094 }
2095 updatescrollmode(p, info, vc);
2096 return 0;
2097 }
2098
2099 static int fbcon_switch(struct vc_data *vc)
2100 {
2101 struct fb_info *info, *old_info = NULL;
2102 struct fbcon_ops *ops;
2103 struct display *p = &fb_display[vc->vc_num];
2104 struct fb_var_screeninfo var;
2105 int i, prev_console, charcnt = 256;
2106
2107 info = registered_fb[con2fb_map[vc->vc_num]];
2108 ops = info->fbcon_par;
2109
2110 if (softback_top) {
2111 if (softback_lines)
2112 fbcon_set_origin(vc);
2113 softback_top = softback_curr = softback_in = softback_buf;
2114 softback_lines = 0;
2115 fbcon_update_softback(vc);
2116 }
2117
2118 if (logo_shown >= 0) {
2119 struct vc_data *conp2 = vc_cons[logo_shown].d;
2120
2121 if (conp2->vc_top == logo_lines
2122 && conp2->vc_bottom == conp2->vc_rows)
2123 conp2->vc_top = 0;
2124 logo_shown = FBCON_LOGO_CANSHOW;
2125 }
2126
2127 prev_console = ops->currcon;
2128 if (prev_console != -1)
2129 old_info = registered_fb[con2fb_map[prev_console]];
2130 /*
2131 * FIXME: If we have multiple fbdev's loaded, we need to
2132 * update all info->currcon. Perhaps, we can place this
2133 * in a centralized structure, but this might break some
2134 * drivers.
2135 *
2136 * info->currcon = vc->vc_num;
2137 */
2138 for (i = 0; i < FB_MAX; i++) {
2139 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2140 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2141
2142 o->currcon = vc->vc_num;
2143 }
2144 }
2145 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2146 display_to_var(&var, p);
2147 var.activate = FB_ACTIVATE_NOW;
2148
2149 /*
2150 * make sure we don't unnecessarily trip the memcmp()
2151 * in fb_set_var()
2152 */
2153 info->var.activate = var.activate;
2154 var.yoffset = info->var.yoffset;
2155 var.xoffset = info->var.xoffset;
2156 var.vmode = info->var.vmode;
2157 fb_set_var(info, &var);
2158 ops->var = info->var;
2159
2160 if (old_info != NULL && (old_info != info ||
2161 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2162 if (info->fbops->fb_set_par)
2163 info->fbops->fb_set_par(info);
2164
2165 if (old_info != info)
2166 fbcon_del_cursor_timer(old_info);
2167 }
2168
2169 if (fbcon_is_inactive(vc, info) ||
2170 ops->blank_state != FB_BLANK_UNBLANK)
2171 fbcon_del_cursor_timer(info);
2172 else
2173 fbcon_add_cursor_timer(info);
2174
2175 set_blitting_type(vc, info);
2176 ops->cursor_reset = 1;
2177
2178 if (ops->rotate_font && ops->rotate_font(info, vc)) {
2179 ops->rotate = FB_ROTATE_UR;
2180 set_blitting_type(vc, info);
2181 }
2182
2183 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2184 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2185
2186 if (p->userfont)
2187 charcnt = FNTCHARCNT(vc->vc_font.data);
2188
2189 if (charcnt > 256)
2190 vc->vc_complement_mask <<= 1;
2191
2192 updatescrollmode(p, info, vc);
2193
2194 switch (p->scrollmode) {
2195 case SCROLL_WRAP_MOVE:
2196 scrollback_phys_max = p->vrows - vc->vc_rows;
2197 break;
2198 case SCROLL_PAN_MOVE:
2199 case SCROLL_PAN_REDRAW:
2200 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2201 if (scrollback_phys_max < 0)
2202 scrollback_phys_max = 0;
2203 break;
2204 default:
2205 scrollback_phys_max = 0;
2206 break;
2207 }
2208
2209 scrollback_max = 0;
2210 scrollback_current = 0;
2211
2212 if (!fbcon_is_inactive(vc, info)) {
2213 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2214 ops->update_start(info);
2215 }
2216
2217 fbcon_set_palette(vc, color_table);
2218 fbcon_clear_margins(vc, 0);
2219
2220 if (logo_shown == FBCON_LOGO_DRAW) {
2221
2222 logo_shown = fg_console;
2223 /* This is protected above by initmem_freed */
2224 fb_show_logo(info, ops->rotate);
2225 update_region(vc,
2226 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2227 vc->vc_size_row * (vc->vc_bottom -
2228 vc->vc_top) / 2);
2229 return 0;
2230 }
2231 return 1;
2232 }
2233
2234 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2235 int blank)
2236 {
2237 if (blank) {
2238 unsigned short charmask = vc->vc_hi_font_mask ?
2239 0x1ff : 0xff;
2240 unsigned short oldc;
2241
2242 oldc = vc->vc_video_erase_char;
2243 vc->vc_video_erase_char &= charmask;
2244 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2245 vc->vc_video_erase_char = oldc;
2246 }
2247 }
2248
2249 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2250 {
2251 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2252 struct fbcon_ops *ops = info->fbcon_par;
2253
2254 if (mode_switch) {
2255 struct fb_var_screeninfo var = info->var;
2256
2257 ops->graphics = 1;
2258
2259 if (!blank) {
2260 if (info->fbops->fb_save_state)
2261 info->fbops->fb_save_state(info);
2262 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2263 fb_set_var(info, &var);
2264 ops->graphics = 0;
2265 ops->var = info->var;
2266 } else if (info->fbops->fb_restore_state)
2267 info->fbops->fb_restore_state(info);
2268 }
2269
2270 if (!fbcon_is_inactive(vc, info)) {
2271 if (ops->blank_state != blank) {
2272 ops->blank_state = blank;
2273 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2274 ops->cursor_flash = (!blank);
2275
2276 if (fb_blank(info, blank))
2277 fbcon_generic_blank(vc, info, blank);
2278 }
2279
2280 if (!blank)
2281 update_screen(vc);
2282 }
2283
2284 if (fbcon_is_inactive(vc, info) ||
2285 ops->blank_state != FB_BLANK_UNBLANK)
2286 fbcon_del_cursor_timer(info);
2287 else
2288 fbcon_add_cursor_timer(info);
2289
2290 return 0;
2291 }
2292
2293 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2294 {
2295 u8 *fontdata = vc->vc_font.data;
2296 u8 *data = font->data;
2297 int i, j;
2298
2299 font->width = vc->vc_font.width;
2300 font->height = vc->vc_font.height;
2301 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2302 if (!font->data)
2303 return 0;
2304
2305 if (font->width <= 8) {
2306 j = vc->vc_font.height;
2307 for (i = 0; i < font->charcount; i++) {
2308 memcpy(data, fontdata, j);
2309 memset(data + j, 0, 32 - j);
2310 data += 32;
2311 fontdata += j;
2312 }
2313 } else if (font->width <= 16) {
2314 j = vc->vc_font.height * 2;
2315 for (i = 0; i < font->charcount; i++) {
2316 memcpy(data, fontdata, j);
2317 memset(data + j, 0, 64 - j);
2318 data += 64;
2319 fontdata += j;
2320 }
2321 } else if (font->width <= 24) {
2322 for (i = 0; i < font->charcount; i++) {
2323 for (j = 0; j < vc->vc_font.height; j++) {
2324 *data++ = fontdata[0];
2325 *data++ = fontdata[1];
2326 *data++ = fontdata[2];
2327 fontdata += sizeof(u32);
2328 }
2329 memset(data, 0, 3 * (32 - j));
2330 data += 3 * (32 - j);
2331 }
2332 } else {
2333 j = vc->vc_font.height * 4;
2334 for (i = 0; i < font->charcount; i++) {
2335 memcpy(data, fontdata, j);
2336 memset(data + j, 0, 128 - j);
2337 data += 128;
2338 fontdata += j;
2339 }
2340 }
2341 return 0;
2342 }
2343
2344 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2345 const u8 * data, int userfont)
2346 {
2347 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2348 struct fbcon_ops *ops = info->fbcon_par;
2349 struct display *p = &fb_display[vc->vc_num];
2350 int resize;
2351 int cnt;
2352 char *old_data = NULL;
2353
2354 if (CON_IS_VISIBLE(vc) && softback_lines)
2355 fbcon_set_origin(vc);
2356
2357 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2358 if (p->userfont)
2359 old_data = vc->vc_font.data;
2360 if (userfont)
2361 cnt = FNTCHARCNT(data);
2362 else
2363 cnt = 256;
2364 vc->vc_font.data = (void *)(p->fontdata = data);
2365 if ((p->userfont = userfont))
2366 REFCOUNT(data)++;
2367 vc->vc_font.width = w;
2368 vc->vc_font.height = h;
2369 if (vc->vc_hi_font_mask && cnt == 256) {
2370 vc->vc_hi_font_mask = 0;
2371 if (vc->vc_can_do_color) {
2372 vc->vc_complement_mask >>= 1;
2373 vc->vc_s_complement_mask >>= 1;
2374 }
2375
2376 /* ++Edmund: reorder the attribute bits */
2377 if (vc->vc_can_do_color) {
2378 unsigned short *cp =
2379 (unsigned short *) vc->vc_origin;
2380 int count = vc->vc_screenbuf_size / 2;
2381 unsigned short c;
2382 for (; count > 0; count--, cp++) {
2383 c = scr_readw(cp);
2384 scr_writew(((c & 0xfe00) >> 1) |
2385 (c & 0xff), cp);
2386 }
2387 c = vc->vc_video_erase_char;
2388 vc->vc_video_erase_char =
2389 ((c & 0xfe00) >> 1) | (c & 0xff);
2390 vc->vc_attr >>= 1;
2391 }
2392 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2393 vc->vc_hi_font_mask = 0x100;
2394 if (vc->vc_can_do_color) {
2395 vc->vc_complement_mask <<= 1;
2396 vc->vc_s_complement_mask <<= 1;
2397 }
2398
2399 /* ++Edmund: reorder the attribute bits */
2400 {
2401 unsigned short *cp =
2402 (unsigned short *) vc->vc_origin;
2403 int count = vc->vc_screenbuf_size / 2;
2404 unsigned short c;
2405 for (; count > 0; count--, cp++) {
2406 unsigned short newc;
2407 c = scr_readw(cp);
2408 if (vc->vc_can_do_color)
2409 newc =
2410 ((c & 0xff00) << 1) | (c &
2411 0xff);
2412 else
2413 newc = c & ~0x100;
2414 scr_writew(newc, cp);
2415 }
2416 c = vc->vc_video_erase_char;
2417 if (vc->vc_can_do_color) {
2418 vc->vc_video_erase_char =
2419 ((c & 0xff00) << 1) | (c & 0xff);
2420 vc->vc_attr <<= 1;
2421 } else
2422 vc->vc_video_erase_char = c & ~0x100;
2423 }
2424
2425 }
2426
2427 if (resize) {
2428 int cols, rows;
2429
2430 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2431 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2432 cols /= w;
2433 rows /= h;
2434 vc_resize(vc, cols, rows);
2435 if (CON_IS_VISIBLE(vc) && softback_buf)
2436 fbcon_update_softback(vc);
2437 } else if (CON_IS_VISIBLE(vc)
2438 && vc->vc_mode == KD_TEXT) {
2439 fbcon_clear_margins(vc, 0);
2440 update_screen(vc);
2441 }
2442
2443 if (old_data && (--REFCOUNT(old_data) == 0))
2444 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2445 return 0;
2446 }
2447
2448 static int fbcon_copy_font(struct vc_data *vc, int con)
2449 {
2450 struct display *od = &fb_display[con];
2451 struct console_font *f = &vc->vc_font;
2452
2453 if (od->fontdata == f->data)
2454 return 0; /* already the same font... */
2455 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2456 }
2457
2458 /*
2459 * User asked to set font; we are guaranteed that
2460 * a) width and height are in range 1..32
2461 * b) charcount does not exceed 512
2462 * but lets not assume that, since someone might someday want to use larger
2463 * fonts. And charcount of 512 is small for unicode support.
2464 *
2465 * However, user space gives the font in 32 rows , regardless of
2466 * actual font height. So a new API is needed if support for larger fonts
2467 * is ever implemented.
2468 */
2469
2470 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2471 {
2472 unsigned charcount = font->charcount;
2473 int w = font->width;
2474 int h = font->height;
2475 int size;
2476 int i, csum;
2477 u8 *new_data, *data = font->data;
2478 int pitch = (font->width+7) >> 3;
2479
2480 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2481 * If not this check should be changed to charcount < 256 */
2482 if (charcount != 256 && charcount != 512)
2483 return -EINVAL;
2484
2485 size = h * pitch * charcount;
2486
2487 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2488
2489 if (!new_data)
2490 return -ENOMEM;
2491
2492 new_data += FONT_EXTRA_WORDS * sizeof(int);
2493 FNTSIZE(new_data) = size;
2494 FNTCHARCNT(new_data) = charcount;
2495 REFCOUNT(new_data) = 0; /* usage counter */
2496 for (i=0; i< charcount; i++) {
2497 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2498 }
2499
2500 /* Since linux has a nice crc32 function use it for counting font
2501 * checksums. */
2502 csum = crc32(0, new_data, size);
2503
2504 FNTSUM(new_data) = csum;
2505 /* Check if the same font is on some other console already */
2506 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2507 struct vc_data *tmp = vc_cons[i].d;
2508
2509 if (fb_display[i].userfont &&
2510 fb_display[i].fontdata &&
2511 FNTSUM(fb_display[i].fontdata) == csum &&
2512 FNTSIZE(fb_display[i].fontdata) == size &&
2513 tmp->vc_font.width == w &&
2514 !memcmp(fb_display[i].fontdata, new_data, size)) {
2515 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2516 new_data = (u8 *)fb_display[i].fontdata;
2517 break;
2518 }
2519 }
2520 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2521 }
2522
2523 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2524 {
2525 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2526 const struct font_desc *f;
2527
2528 if (!name)
2529 f = get_default_font(info->var.xres, info->var.yres);
2530 else if (!(f = find_font(name)))
2531 return -ENOENT;
2532
2533 font->width = f->width;
2534 font->height = f->height;
2535 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2536 }
2537
2538 static u16 palette_red[16];
2539 static u16 palette_green[16];
2540 static u16 palette_blue[16];
2541
2542 static struct fb_cmap palette_cmap = {
2543 0, 16, palette_red, palette_green, palette_blue, NULL
2544 };
2545
2546 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2547 {
2548 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2549 int i, j, k, depth;
2550 u8 val;
2551
2552 if (fbcon_is_inactive(vc, info))
2553 return -EINVAL;
2554
2555 if (!CON_IS_VISIBLE(vc))
2556 return 0;
2557
2558 depth = fb_get_color_depth(&info->var, &info->fix);
2559 if (depth > 3) {
2560 for (i = j = 0; i < 16; i++) {
2561 k = table[i];
2562 val = vc->vc_palette[j++];
2563 palette_red[k] = (val << 8) | val;
2564 val = vc->vc_palette[j++];
2565 palette_green[k] = (val << 8) | val;
2566 val = vc->vc_palette[j++];
2567 palette_blue[k] = (val << 8) | val;
2568 }
2569 palette_cmap.len = 16;
2570 palette_cmap.start = 0;
2571 /*
2572 * If framebuffer is capable of less than 16 colors,
2573 * use default palette of fbcon.
2574 */
2575 } else
2576 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2577
2578 return fb_set_cmap(&palette_cmap, info);
2579 }
2580
2581 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2582 {
2583 unsigned long p;
2584 int line;
2585
2586 if (vc->vc_num != fg_console || !softback_lines)
2587 return (u16 *) (vc->vc_origin + offset);
2588 line = offset / vc->vc_size_row;
2589 if (line >= softback_lines)
2590 return (u16 *) (vc->vc_origin + offset -
2591 softback_lines * vc->vc_size_row);
2592 p = softback_curr + offset;
2593 if (p >= softback_end)
2594 p += softback_buf - softback_end;
2595 return (u16 *) p;
2596 }
2597
2598 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2599 int *px, int *py)
2600 {
2601 unsigned long ret;
2602 int x, y;
2603
2604 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2605 unsigned long offset = (pos - vc->vc_origin) / 2;
2606
2607 x = offset % vc->vc_cols;
2608 y = offset / vc->vc_cols;
2609 if (vc->vc_num == fg_console)
2610 y += softback_lines;
2611 ret = pos + (vc->vc_cols - x) * 2;
2612 } else if (vc->vc_num == fg_console && softback_lines) {
2613 unsigned long offset = pos - softback_curr;
2614
2615 if (pos < softback_curr)
2616 offset += softback_end - softback_buf;
2617 offset /= 2;
2618 x = offset % vc->vc_cols;
2619 y = offset / vc->vc_cols;
2620 ret = pos + (vc->vc_cols - x) * 2;
2621 if (ret == softback_end)
2622 ret = softback_buf;
2623 if (ret == softback_in)
2624 ret = vc->vc_origin;
2625 } else {
2626 /* Should not happen */
2627 x = y = 0;
2628 ret = vc->vc_origin;
2629 }
2630 if (px)
2631 *px = x;
2632 if (py)
2633 *py = y;
2634 return ret;
2635 }
2636
2637 /* As we might be inside of softback, we may work with non-contiguous buffer,
2638 that's why we have to use a separate routine. */
2639 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2640 {
2641 while (cnt--) {
2642 u16 a = scr_readw(p);
2643 if (!vc->vc_can_do_color)
2644 a ^= 0x0800;
2645 else if (vc->vc_hi_font_mask == 0x100)
2646 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2647 (((a) & 0x0e00) << 4);
2648 else
2649 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2650 (((a) & 0x0700) << 4);
2651 scr_writew(a, p++);
2652 if (p == (u16 *) softback_end)
2653 p = (u16 *) softback_buf;
2654 if (p == (u16 *) softback_in)
2655 p = (u16 *) vc->vc_origin;
2656 }
2657 }
2658
2659 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2660 {
2661 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2662 struct fbcon_ops *ops = info->fbcon_par;
2663 struct display *p = &fb_display[fg_console];
2664 int offset, limit, scrollback_old;
2665
2666 if (softback_top) {
2667 if (vc->vc_num != fg_console)
2668 return 0;
2669 if (vc->vc_mode != KD_TEXT || !lines)
2670 return 0;
2671 if (logo_shown >= 0) {
2672 struct vc_data *conp2 = vc_cons[logo_shown].d;
2673
2674 if (conp2->vc_top == logo_lines
2675 && conp2->vc_bottom == conp2->vc_rows)
2676 conp2->vc_top = 0;
2677 if (logo_shown == vc->vc_num) {
2678 unsigned long p, q;
2679 int i;
2680
2681 p = softback_in;
2682 q = vc->vc_origin +
2683 logo_lines * vc->vc_size_row;
2684 for (i = 0; i < logo_lines; i++) {
2685 if (p == softback_top)
2686 break;
2687 if (p == softback_buf)
2688 p = softback_end;
2689 p -= vc->vc_size_row;
2690 q -= vc->vc_size_row;
2691 scr_memcpyw((u16 *) q, (u16 *) p,
2692 vc->vc_size_row);
2693 }
2694 softback_in = softback_curr = p;
2695 update_region(vc, vc->vc_origin,
2696 logo_lines * vc->vc_cols);
2697 }
2698 logo_shown = FBCON_LOGO_CANSHOW;
2699 }
2700 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2701 fbcon_redraw_softback(vc, p, lines);
2702 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2703 return 0;
2704 }
2705
2706 if (!scrollback_phys_max)
2707 return -ENOSYS;
2708
2709 scrollback_old = scrollback_current;
2710 scrollback_current -= lines;
2711 if (scrollback_current < 0)
2712 scrollback_current = 0;
2713 else if (scrollback_current > scrollback_max)
2714 scrollback_current = scrollback_max;
2715 if (scrollback_current == scrollback_old)
2716 return 0;
2717
2718 if (fbcon_is_inactive(vc, info))
2719 return 0;
2720
2721 fbcon_cursor(vc, CM_ERASE);
2722
2723 offset = p->yscroll - scrollback_current;
2724 limit = p->vrows;
2725 switch (p->scrollmode) {
2726 case SCROLL_WRAP_MOVE:
2727 info->var.vmode |= FB_VMODE_YWRAP;
2728 break;
2729 case SCROLL_PAN_MOVE:
2730 case SCROLL_PAN_REDRAW:
2731 limit -= vc->vc_rows;
2732 info->var.vmode &= ~FB_VMODE_YWRAP;
2733 break;
2734 }
2735 if (offset < 0)
2736 offset += limit;
2737 else if (offset >= limit)
2738 offset -= limit;
2739
2740 ops->var.xoffset = 0;
2741 ops->var.yoffset = offset * vc->vc_font.height;
2742 ops->update_start(info);
2743
2744 if (!scrollback_current)
2745 fbcon_cursor(vc, CM_DRAW);
2746 return 0;
2747 }
2748
2749 static int fbcon_set_origin(struct vc_data *vc)
2750 {
2751 if (softback_lines)
2752 fbcon_scrolldelta(vc, softback_lines);
2753 return 0;
2754 }
2755
2756 static void fbcon_suspended(struct fb_info *info)
2757 {
2758 struct vc_data *vc = NULL;
2759 struct fbcon_ops *ops = info->fbcon_par;
2760
2761 if (!ops || ops->currcon < 0)
2762 return;
2763 vc = vc_cons[ops->currcon].d;
2764
2765 /* Clear cursor, restore saved data */
2766 fbcon_cursor(vc, CM_ERASE);
2767 }
2768
2769 static void fbcon_resumed(struct fb_info *info)
2770 {
2771 struct vc_data *vc;
2772 struct fbcon_ops *ops = info->fbcon_par;
2773
2774 if (!ops || ops->currcon < 0)
2775 return;
2776 vc = vc_cons[ops->currcon].d;
2777
2778 update_screen(vc);
2779 }
2780
2781 static void fbcon_modechanged(struct fb_info *info)
2782 {
2783 struct fbcon_ops *ops = info->fbcon_par;
2784 struct vc_data *vc;
2785 struct display *p;
2786 int rows, cols;
2787
2788 if (!ops || ops->currcon < 0)
2789 return;
2790 vc = vc_cons[ops->currcon].d;
2791 if (vc->vc_mode != KD_TEXT ||
2792 registered_fb[con2fb_map[ops->currcon]] != info)
2793 return;
2794
2795 p = &fb_display[vc->vc_num];
2796 set_blitting_type(vc, info);
2797
2798 if (CON_IS_VISIBLE(vc)) {
2799 var_to_display(p, &info->var, info);
2800 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2801 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2802 cols /= vc->vc_font.width;
2803 rows /= vc->vc_font.height;
2804 vc_resize(vc, cols, rows);
2805 updatescrollmode(p, info, vc);
2806 scrollback_max = 0;
2807 scrollback_current = 0;
2808
2809 if (!fbcon_is_inactive(vc, info)) {
2810 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2811 ops->update_start(info);
2812 }
2813
2814 fbcon_set_palette(vc, color_table);
2815 update_screen(vc);
2816 if (softback_buf)
2817 fbcon_update_softback(vc);
2818 }
2819 }
2820
2821 static void fbcon_set_all_vcs(struct fb_info *info)
2822 {
2823 struct fbcon_ops *ops = info->fbcon_par;
2824 struct vc_data *vc;
2825 struct display *p;
2826 int i, rows, cols;
2827
2828 if (!ops || ops->currcon < 0)
2829 return;
2830
2831 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2832 vc = vc_cons[i].d;
2833 if (!vc || vc->vc_mode != KD_TEXT ||
2834 registered_fb[con2fb_map[i]] != info)
2835 continue;
2836
2837 p = &fb_display[vc->vc_num];
2838 set_blitting_type(vc, info);
2839 var_to_display(p, &info->var, info);
2840 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2841 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2842 cols /= vc->vc_font.width;
2843 rows /= vc->vc_font.height;
2844 vc_resize(vc, cols, rows);
2845
2846 if (CON_IS_VISIBLE(vc)) {
2847 updatescrollmode(p, info, vc);
2848 scrollback_max = 0;
2849 scrollback_current = 0;
2850
2851 if (!fbcon_is_inactive(vc, info)) {
2852 ops->var.xoffset = ops->var.yoffset =
2853 p->yscroll = 0;
2854 ops->update_start(info);
2855 }
2856
2857 fbcon_set_palette(vc, color_table);
2858 update_screen(vc);
2859 if (softback_buf)
2860 fbcon_update_softback(vc);
2861 }
2862 }
2863
2864 ops->p = &fb_display[ops->currcon];
2865 }
2866
2867 static int fbcon_mode_deleted(struct fb_info *info,
2868 struct fb_videomode *mode)
2869 {
2870 struct fb_info *fb_info;
2871 struct display *p;
2872 int i, j, found = 0;
2873
2874 /* before deletion, ensure that mode is not in use */
2875 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2876 j = con2fb_map[i];
2877 if (j == -1)
2878 continue;
2879 fb_info = registered_fb[j];
2880 if (fb_info != info)
2881 continue;
2882 p = &fb_display[i];
2883 if (!p || !p->mode)
2884 continue;
2885 if (fb_mode_is_equal(p->mode, mode)) {
2886 found = 1;
2887 break;
2888 }
2889 }
2890 return found;
2891 }
2892
2893 static int fbcon_fb_unregistered(int idx)
2894 {
2895 int i;
2896
2897 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2898 if (con2fb_map[i] == idx)
2899 con2fb_map[i] = -1;
2900 }
2901
2902 if (idx == info_idx) {
2903 info_idx = -1;
2904
2905 for (i = 0; i < FB_MAX; i++) {
2906 if (registered_fb[i] != NULL) {
2907 info_idx = i;
2908 break;
2909 }
2910 }
2911 }
2912
2913 if (info_idx != -1) {
2914 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2915 if (con2fb_map[i] == -1)
2916 con2fb_map[i] = info_idx;
2917 }
2918 }
2919
2920 if (!num_registered_fb)
2921 unregister_con_driver(&fb_con);
2922
2923 return 0;
2924 }
2925
2926 static int fbcon_fb_registered(int idx)
2927 {
2928 int ret = 0, i;
2929
2930 if (info_idx == -1) {
2931 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2932 if (con2fb_map_boot[i] == idx) {
2933 info_idx = idx;
2934 break;
2935 }
2936 }
2937
2938 if (info_idx != -1)
2939 ret = fbcon_takeover(1);
2940 } else {
2941 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2942 if (con2fb_map_boot[i] == idx &&
2943 con2fb_map[i] == -1)
2944 set_con2fb_map(i, idx, 0);
2945 }
2946 }
2947
2948 return ret;
2949 }
2950
2951 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2952 {
2953 struct fbcon_ops *ops = info->fbcon_par;
2954 struct vc_data *vc;
2955
2956 if (!ops || ops->currcon < 0)
2957 return;
2958
2959 vc = vc_cons[ops->currcon].d;
2960 if (vc->vc_mode != KD_TEXT ||
2961 registered_fb[con2fb_map[ops->currcon]] != info)
2962 return;
2963
2964 if (CON_IS_VISIBLE(vc)) {
2965 if (blank)
2966 do_blank_screen(0);
2967 else
2968 do_unblank_screen(0);
2969 }
2970 ops->blank_state = blank;
2971 }
2972
2973 static void fbcon_new_modelist(struct fb_info *info)
2974 {
2975 int i;
2976 struct vc_data *vc;
2977 struct fb_var_screeninfo var;
2978 struct fb_videomode *mode;
2979
2980 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2981 if (registered_fb[con2fb_map[i]] != info)
2982 continue;
2983 if (!fb_display[i].mode)
2984 continue;
2985 vc = vc_cons[i].d;
2986 display_to_var(&var, &fb_display[i]);
2987 mode = fb_find_nearest_mode(fb_display[i].mode,
2988 &info->modelist);
2989 fb_videomode_to_var(&var, mode);
2990
2991 if (vc)
2992 fbcon_set_disp(info, &var, vc);
2993 else
2994 fbcon_preset_disp(info, &var, i);
2995
2996 }
2997 }
2998
2999 static int fbcon_event_notify(struct notifier_block *self,
3000 unsigned long action, void *data)
3001 {
3002 struct fb_event *event = data;
3003 struct fb_info *info = event->info;
3004 struct fb_videomode *mode;
3005 struct fb_con2fbmap *con2fb;
3006 int ret = 0;
3007
3008 /*
3009 * ignore all events except driver registration and deregistration
3010 * if fbcon is not active
3011 */
3012 if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3013 action == FB_EVENT_FB_UNREGISTERED))
3014 goto done;
3015
3016 switch(action) {
3017 case FB_EVENT_SUSPEND:
3018 fbcon_suspended(info);
3019 break;
3020 case FB_EVENT_RESUME:
3021 fbcon_resumed(info);
3022 break;
3023 case FB_EVENT_MODE_CHANGE:
3024 fbcon_modechanged(info);
3025 break;
3026 case FB_EVENT_MODE_CHANGE_ALL:
3027 fbcon_set_all_vcs(info);
3028 break;
3029 case FB_EVENT_MODE_DELETE:
3030 mode = event->data;
3031 ret = fbcon_mode_deleted(info, mode);
3032 break;
3033 case FB_EVENT_FB_REGISTERED:
3034 ret = fbcon_fb_registered(info->node);
3035 break;
3036 case FB_EVENT_FB_UNREGISTERED:
3037 ret = fbcon_fb_unregistered(info->node);
3038 break;
3039 case FB_EVENT_SET_CONSOLE_MAP:
3040 con2fb = event->data;
3041 ret = set_con2fb_map(con2fb->console - 1,
3042 con2fb->framebuffer, 1);
3043 break;
3044 case FB_EVENT_GET_CONSOLE_MAP:
3045 con2fb = event->data;
3046 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3047 break;
3048 case FB_EVENT_BLANK:
3049 fbcon_fb_blanked(info, *(int *)event->data);
3050 break;
3051 case FB_EVENT_NEW_MODELIST:
3052 fbcon_new_modelist(info);
3053 break;
3054 }
3055
3056 done:
3057 return ret;
3058 }
3059
3060 /*
3061 * The console `switch' structure for the frame buffer based console
3062 */
3063
3064 static const struct consw fb_con = {
3065 .owner = THIS_MODULE,
3066 .con_startup = fbcon_startup,
3067 .con_init = fbcon_init,
3068 .con_deinit = fbcon_deinit,
3069 .con_clear = fbcon_clear,
3070 .con_putc = fbcon_putc,
3071 .con_putcs = fbcon_putcs,
3072 .con_cursor = fbcon_cursor,
3073 .con_scroll = fbcon_scroll,
3074 .con_bmove = fbcon_bmove,
3075 .con_switch = fbcon_switch,
3076 .con_blank = fbcon_blank,
3077 .con_font_set = fbcon_set_font,
3078 .con_font_get = fbcon_get_font,
3079 .con_font_default = fbcon_set_def_font,
3080 .con_font_copy = fbcon_copy_font,
3081 .con_set_palette = fbcon_set_palette,
3082 .con_scrolldelta = fbcon_scrolldelta,
3083 .con_set_origin = fbcon_set_origin,
3084 .con_invert_region = fbcon_invert_region,
3085 .con_screen_pos = fbcon_screen_pos,
3086 .con_getxy = fbcon_getxy,
3087 .con_resize = fbcon_resize,
3088 };
3089
3090 static struct notifier_block fbcon_event_notifier = {
3091 .notifier_call = fbcon_event_notify,
3092 };
3093
3094 static ssize_t store_rotate(struct class_device *class_device,
3095 const char *buf, size_t count)
3096 {
3097 struct fb_info *info;
3098 int rotate, idx;
3099 char **last = NULL;
3100
3101 if (fbcon_has_exited)
3102 return count;
3103
3104 acquire_console_sem();
3105 idx = con2fb_map[fg_console];
3106
3107 if (idx == -1 || registered_fb[idx] == NULL)
3108 goto err;
3109
3110 info = registered_fb[idx];
3111 rotate = simple_strtoul(buf, last, 0);
3112 fbcon_rotate(info, rotate);
3113 err:
3114 release_console_sem();
3115 return count;
3116 }
3117
3118 static ssize_t store_rotate_all(struct class_device *class_device,
3119 const char *buf, size_t count)
3120 {
3121 struct fb_info *info;
3122 int rotate, idx;
3123 char **last = NULL;
3124
3125 if (fbcon_has_exited)
3126 return count;
3127
3128 acquire_console_sem();
3129 idx = con2fb_map[fg_console];
3130
3131 if (idx == -1 || registered_fb[idx] == NULL)
3132 goto err;
3133
3134 info = registered_fb[idx];
3135 rotate = simple_strtoul(buf, last, 0);
3136 fbcon_rotate_all(info, rotate);
3137 err:
3138 release_console_sem();
3139 return count;
3140 }
3141
3142 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3143 {
3144 struct fb_info *info;
3145 int rotate = 0, idx;
3146
3147 if (fbcon_has_exited)
3148 return 0;
3149
3150 acquire_console_sem();
3151 idx = con2fb_map[fg_console];
3152
3153 if (idx == -1 || registered_fb[idx] == NULL)
3154 goto err;
3155
3156 info = registered_fb[idx];
3157 rotate = fbcon_get_rotate(info);
3158 err:
3159 release_console_sem();
3160 return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3161 }
3162
3163 static struct class_device_attribute class_device_attrs[] = {
3164 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3165 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3166 };
3167
3168 static int fbcon_init_class_device(void)
3169 {
3170 int i, error = 0;
3171
3172 fbcon_has_sysfs = 1;
3173
3174 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
3175 error = class_device_create_file(fbcon_class_device,
3176 &class_device_attrs[i]);
3177
3178 if (error)
3179 break;
3180 }
3181
3182 if (error) {
3183 while (--i >= 0)
3184 class_device_remove_file(fbcon_class_device,
3185 &class_device_attrs[i]);
3186
3187 fbcon_has_sysfs = 0;
3188 }
3189
3190 return 0;
3191 }
3192
3193 static void fbcon_start(void)
3194 {
3195 if (num_registered_fb) {
3196 int i;
3197
3198 acquire_console_sem();
3199
3200 for (i = 0; i < FB_MAX; i++) {
3201 if (registered_fb[i] != NULL) {
3202 info_idx = i;
3203 break;
3204 }
3205 }
3206
3207 release_console_sem();
3208 fbcon_takeover(0);
3209 }
3210 }
3211
3212 static void fbcon_exit(void)
3213 {
3214 struct fb_info *info;
3215 int i, j, mapped;
3216
3217 if (fbcon_has_exited)
3218 return;
3219
3220 #ifdef CONFIG_ATARI
3221 free_irq(IRQ_AUTO_4, fb_vbl_handler);
3222 #endif
3223 #ifdef CONFIG_MAC
3224 if (MACH_IS_MAC && vbl_detected)
3225 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3226 #endif
3227
3228 kfree((void *)softback_buf);
3229 softback_buf = 0UL;
3230
3231 for (i = 0; i < FB_MAX; i++) {
3232 mapped = 0;
3233 info = registered_fb[i];
3234
3235 if (info == NULL)
3236 continue;
3237
3238 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3239 if (con2fb_map[j] == i)
3240 mapped = 1;
3241 }
3242
3243 if (mapped) {
3244 if (info->fbops->fb_release)
3245 info->fbops->fb_release(info, 0);
3246 module_put(info->fbops->owner);
3247
3248 if (info->fbcon_par) {
3249 struct fbcon_ops *ops = info->fbcon_par;
3250
3251 fbcon_del_cursor_timer(info);
3252 kfree(ops->cursor_src);
3253 kfree(info->fbcon_par);
3254 info->fbcon_par = NULL;
3255 }
3256
3257 if (info->queue.func == fb_flashcursor)
3258 info->queue.func = NULL;
3259 }
3260 }
3261
3262 fbcon_has_exited = 1;
3263 }
3264
3265 static int __init fb_console_init(void)
3266 {
3267 int i;
3268
3269 acquire_console_sem();
3270 fb_register_client(&fbcon_event_notifier);
3271 fbcon_class_device =
3272 class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3273
3274 if (IS_ERR(fbcon_class_device)) {
3275 printk(KERN_WARNING "Unable to create class_device "
3276 "for fbcon; errno = %ld\n",
3277 PTR_ERR(fbcon_class_device));
3278 fbcon_class_device = NULL;
3279 } else
3280 fbcon_init_class_device();
3281
3282 for (i = 0; i < MAX_NR_CONSOLES; i++)
3283 con2fb_map[i] = -1;
3284
3285 release_console_sem();
3286 fbcon_start();
3287 return 0;
3288 }
3289
3290 module_init(fb_console_init);
3291
3292 #ifdef MODULE
3293
3294 static void __exit fbcon_deinit_class_device(void)
3295 {
3296 int i;
3297
3298 if (fbcon_has_sysfs) {
3299 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3300 class_device_remove_file(fbcon_class_device,
3301 &class_device_attrs[i]);
3302
3303 fbcon_has_sysfs = 0;
3304 }
3305 }
3306
3307 static void __exit fb_console_exit(void)
3308 {
3309 acquire_console_sem();
3310 fb_unregister_client(&fbcon_event_notifier);
3311 fbcon_deinit_class_device();
3312 class_device_destroy(fb_class, MKDEV(0, 0));
3313 fbcon_exit();
3314 release_console_sem();
3315 unregister_con_driver(&fb_con);
3316 }
3317
3318 module_exit(fb_console_exit);
3319
3320 #endif
3321
3322 MODULE_LICENSE("GPL");
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